$ git clone -n https://src.fedoraproject.org/rpms/libnftnl.git /var/lib/mock/f45-build-16636-489/root/chroot_tmpdir/scmroot/libnftnl
Cloning into '/var/lib/mock/f45-build-16636-489/root/chroot_tmpdir/scmroot/libnftnl'...
$ git fetch origin 68af55e34affd4059ac7acf40bd8a8a06f682287:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libnftnl
 * [new ref]         68af55e34affd4059ac7acf40bd8a8a06f682287 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 68af55e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild